How a VRV / VRF System Works — Interactive 3D
Drag to orbit, zoom in on any unit, and click equipment to learn what it does. Follow the single pair of refrigerant pipes from the outdoor unit, through the refnet branches, to each indoor unit — and watch the refrigerant flow. Take the guided tour for a step-by-step walkthrough.
Illustrative model for education. Pipe routing, unit counts and indoor-unit mix are typical — every real VRV system is designed to its own layout and load.
How VRV / VRF Works
VRV (Variable Refrigerant Volume) moves heat with refrigerant instead of water — no chilled-water plant, no cooling tower, just one compact pair of copper pipes.
One pair of pipes, many rooms
An inverter compressor in the rooftop outdoor unit varies the refrigerant flow to match the building's load moment by moment. Two insulated copper pipes — a gas (suction) line and a liquid line — run into the building, where refnet Y-joints branch them out to each indoor unit. After every branch the pipe steps down in size as the connected capacity drops. Each indoor unit has its own expansion valve, so different rooms can run at different temperatures, all from one outdoor unit.
Indoor units for every space
Ceiling cassettes for open offices and shops, wall-mounted units for small rooms, and concealed ducted units where the air-conditioning needs to be invisible — fed by the short ducting we fabricate in-house.
Designed, supplied and installed by one team
PT. Son Duct Sejahtera designs, supplies, installs and commissions complete VRV / VRF systems — Daikin, LG, Mitsubishi, Gree and more — from outdoor units and refrigerant piping to the indoor units and ducting.
Coming soon: enter your indoor-unit selection and this page will size the refrigerant main and branch pipes and pick the refnet joints for you — plus room cooling load (BTU/h).
See the Chiller Plant in 3DPlanning a VRV or HVAC Project?
Tell us about your building — our engineering team will respond with a practical proposal and competitive quotation.
Contact Us Today